Achievement method of high‐speed response of error prediction tracking control for optical disk system |
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| Authors: | Toru Hayano Isao Shibutani Kiyoshi Ohishi Toshimasa Miyazaki Daiichi Koide Haruki Tokumaru |
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| Affiliation: | 1. Nagaoka University of Technology, Japan;2. Nagaoka National College of Technology, Japan;3. NHK Science and Technical Research Laboratories, Japan |
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| Abstract: | This paper proposes the new design method of error‐prediction control systems combining the ZPET control and the robust feedback control. The error‐prediction control system based on ZPET control can reduce the tracking error caused by periodic disturbances more efficiently than the conventional repetitive control technique. However, the proposed tracking servo system does not reduce the residual tracking error caused by the low‐pass filter of the feedforward compensation and by the long sampling time. In order to overcome this problem, this paper proposes the new structure of the feedforward tracking control system. The modified ZPET control tracking servo system for optical disk recording system does not include the low‐pass filter and its sampling time becomes faster. On the other hand, the sudden disturbance observer reduces the influence of nonperiodic disturbances. The experimental results point out that the proposed tracking servo system has a precise tracking response against both the periodic disturbances and the nonperiodic disturbances. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 170(4): 51–59, 2010; Published online in Wiley InterScience ( www.interscience. wiley.com ). DOI 10.1002/eej.20800 |
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| Keywords: | optical disk recording system robust control zero phase error tracking control prediction of tracking error |
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